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If you're asking if a table can have multiple columns as a primary key, then for MS SQL Server, the answer is yes, and it's called a composite (corrected) key.
18 Αυγ 2019 · You can create a composite primary key just as you would create a single primary key, except that instead of specifying just one column, you provide the name of two or more columns, separated by a comma.
The PRIMARY KEY constraint uniquely identifies each record in a table. Primary keys must contain UNIQUE values, and cannot contain NULL values. A table can have only ONE primary key; and in the table, this primary key can consist of single or multiple columns (fields).
18 Απρ 2024 · In Table Designer, select the row selector for the database column you want to define as the primary key. If you want to select multiple columns, hold down the CTRL key while you select the row selectors for the other columns. Right-click the row selector for the column and select Set Primary Key.
Operation. A PRIMARY KEY can be defined on a column or multiple columns while creating a table or later. It is also possible to drop a PRIMARY KEY in a table if not required. SQL Server PRIMARY KEY Syntax.
In SQL Server, I already created a table called tblDatabase with some columns. I want to add a primary key on the two columns DatabaseName and Servername. I tried to add: ALTER TABLE tblDatabase ADD CONSTRAINT pk_DatabaseServer. PRIMARY KEY (DatabaseName, ServerName)
22 Φεβ 2022 · Create Primary Key on Multiple Columns in SQL Server. Primary Key During the Table Creation. Primary Key After the Table Creation. Drop the Primary Key in SQL Server. Modify the Primary Key. Disable/Enable Primary Key. The Myths about the Primary Key. Table with Primary Key is not a Heap Table.
